Grate.



Patented Apr. 9, |901. C. YINGLING.

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K f l u .mmm E l lNrrnn STATES PATENT Finca.

CHARLES YINGLING, OF METUCHEN, NEW JERSEY.

GRATE.

.SPECIFICATION formingpart of Letters Patent No. 671,905, dated April 9, 1901.

Application filed October 4, 1898.

'To all whom, t may concern.-

Be it known that I, CHARLES YINGLING, a

citizen of the United States, residing at Me- -any purpose, but is intended more especially for grates used in connection with steam-boiler furnaces, and I will describe it as so applied. It is of the class known as double-shaking, Ehaving provisions, including one vibrating 1ewer, for rocking the alternate sections in' opposite directions. I employ such a form and arrangement of the sections that the fingers can never be overheated. The fire is never .allowed to get below the ends of the ngers, :and the metal of the fingers, while exposed to high temperature on their upper surfaces, is always cooled by a flow of air upward.

The accompanying drawings form a part of :this specification and represent what I consider the best means of carrying out the invention.

Figure 1 is a plan view with certain portions at the back of the grate omitted. Fig. 2 is a partial elevation and a longitudinal Vertical section on the line 2 2 in Fig. 1, showing the several sections of the grate at rest for supporting the burning fuel. Fig. 3 is a corresponding elevation showing the several sections in the act of being rocked. Fig. 4 is an velevation ofA one of the removable end pieces viewed from the right in Fig. Land Fig. 5 is a corresponding end elevation. Figs. 6, 7, 8, and 9 are on a larger scale. Fig. 6 is a vertical cross-section of a portion in and adjacent to one of the side bars of the frame with some of the adjacent parts in elevation. Fig. 7 is a corresponding cross-section at another point in and near the middle bar. Fig. 8 is a perspective View of one of the rocking portions or sections detached. Fig. 9 is a longitudinal vertical section of a portion of an elevation of one of the detachable but otherwise xed portions of the structure.

Similar letters of reference indicate corresponding parts in all the figures where they appear.

A A are the side frames; A' A', the crossframes at the ends of the grate; A2, a sepa- Serial No. 692,594. (No model.)

rately-formed longitudinal piece traversing the mid-wid th, and A3 A3, &c. the separatelyformed legs rigidly connected by bolts and nuts securing the latter to the other portions of the framing. These parts, rigidly united, constitute the framing which supports the grate-sections and which by the aid of brackets A4 and center-pins A5, bolted on the boilerfront, carry the operating-levers.

On the inner face of each of the side frames A A are pockets a', which support the ends of two series of movable bearers or rocking shafts B and C, Fig. 2, which are each supplied with a series of parallel fingers B' C', respectively, presenting each a straight bearing-surface to support the burning fuel at a much higher level than the shaft. These parts are cast integral, and in the connecting metal between the fingers and the shaft is a large hole b, which allows the circulation of air transversely through the part and reduces the conduction of heat downward. Each rocking section B has also an arm B2, extending downward and carrying a short transverse pin B3. These sections are so formed and applied together that the fingers of each section lie between the ends of the fingers of the adjacent section. They are matched with looseness to allow proper uniform air-spaces. The spaces may vary according to lthe size of the coal to be used.

l provide two longitudinal link-bars D and E, connected to the several pins B3 C3, the bar D being connected to the pins B3 of one series of sections of the grate and by its longitudinal movement causing them all to rock simultaneously in the same direction and the bar E being similarly connected to the pins C3 on the arms O2, carrying the iingers C', the shafts C and these several attachments being interposed between the several sections B and similarly supported in pockets in the framing and rocking always in the opposite direction to the motion of the other series B. Each of these horizontal links D and E has a rigid arm extended downward, marked, respectively, D E.

G is a hand-lever turning on the pin or pivot A5 and having pins G Gr2 set therein above and below the center A5, which serve as pivots for links I J, which are extended through holes a2 a3 in the adjacent frame A and are IOO provided with screw-threaded portions which are engaged loosely each in a hole in the corresponding pendent arm D or E and are allowed tewerk the rods, and therefore the connected grate-sections,by the aid of adjustable nuts K and adjustable opposing nuts K. One link, I, is thus loosely and adjustably connected to the bar D and the other, J, to the bar E. Vvlhen the lever G is .vibrated by the attendant, the bars D and E are moved simultaneously endwise, causing the sections B and C to rock correspondingly in opposite directions and also to carry their upper surfaces forward and backward relatively to each other. The ends of the fingers remain always more or less locked or interleaved, not only when the grate-sections are at rest, with their bearing edges B C' level, but also when they are rocked into extreme forward and rearward and extreme inclined position and in all the intermediate positions. There is no chance for the burning fuel to surround and burn the ends of any of the ngers. It can only lie on the top, and there is always free access for air to flow up past the metal below and convey upward the heat.

The considerable depth of each shaft B and C below its fuel-supporting surface B C and the thinness of the metal connections prevent any rapid transmission of heat downward. The rocking shafts are kept cool by the flow 0f cool air upward from below.

The upper edge of each side frame A is cast with deep undercut notches a, extending down something like half the depth ofthe bar, dividing the upper portion of the latter into short. lengths,which when heated by the glowing coals thereon may expand and contract independently without bending or straining the main body A. The notches a are increased in width at the bottom, so that there is little metal to conduct the heat downward from the separated portions A# at the upper edge. These upper portions A55 may assume any temperature required short of melting, and each will expand and contract independently without straining the supporting portion of the frame below.

In the mounting of new sections B or C in my frame or when at any time it shall be judged expedient to adjust the mounting afterward it is easily accomplished by adjusting the nuts K and K.

Besides the two series of rocking sections B and C, I provide two loose sections or bars AG, one at each end of the frame, which are not capable of rocking; but each extends a series of fingers A8 in a uniformly-level plane to lie between the contiguous finger ends of the adjacent rocking sections.

The cross-pieces of the fixed framing have each an offset a4 at about the mid-height on the inner face. These receive and support the removable bars A6, the stationary fingers of which extend inward at the mean level of the tops B C' of the rocking sections. These removable bars are kept in place partly by stout internal ridges A7, one near each end of each end frame A. These bars A6 are shown in two lengths, the inner end of each being held up by an odset a5 in the middle-bar A2. This middle bar is itself removable, each end being supported in a suitable socket formed at the mid-length of each cross-bar A on the inner face. The plan view, Fig. l, omits one line of fingers to show more clearly the inner ends of the removable bars. These said removable bars A6 are peculiarly formed by having between each of the fingers A8 and the next an undercut notch corresponding to the notches ain the side frame-that is to say, a space extending down about half the depth of the bar, open, but narrow, at the top and wider below. This construction affords the requisite strength for supporting the fingers A8 and limiting the conduction of heat from the top downward and allows ample space at short intervals for the greater expansion of the upper edge under the greater heat to which it is subjected. These bars A6 being in separate lengths cannot warp injuriously from the effects of heat.

lIt will be noted that each grate-bar, including its shaft and fingers, is in two sections, so that the entire rocking grate-bars are presented in two longitudinal series. This permits the convenient shaking of but one-half of the grate, distinct link and operating-lever devices being provided for each section. Fig. 7 illustrates the divided character of a gratebar and how it bears at its divided portion on the central longitudinal bar A2.

I attach importance to the fact that the perforations b in the fingers C are in line with each other and with the spaces Abetween the inverted triangles when the grate is in condition for use, because it allows a direct and active movement ofthe air therethrough, tending by the connection due to the cold air, as well as by the large surface presented for radiation, to promote the durability of the grate.

Modifications maybe made without departing from the principle or sacrificing the advantages of the invention. There may be a greater or less number of the sections B and C. The distance of the pivots G G2 from the center A5, on which the lever G turns, may be varied, so that a given amount of rocking motion of the lever G will give a greater or less turning motion to the several sections of the grate. The dimensions otherwise may be varied. I prefer to have the several lingers B C about six inches in length and to have the center of the rocking motion about three inches below the upper surfaces of the several sections and spaced about one and fiveeighths inches from center to center and to have the fingers about one-half inch wide. Where nut or larger coal is to be used, wider spacing could be allowed. Parts of the invention can be used without the Whole. The middle bar A2 may be omitted. There may be more than one of the middle bars A2, and

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a corresponding shortening and increase in the number of the removable end pieces A6. The end pieces may be thus divided without increasing the number of the bars A2 by providing a sufficient number of supports corresponding to the internal ridges A7, distributed along on the oEset-s a5 on the permanent pieces A.

'I have in my experiments made a large grate with as many as six of the removable pieces A6, of equal length, stretching along on a single permanent end piece of the grate.`

I claim as my invention- 1. In a shaking-grate, the combination with a supporting-frame having a series of separated upright projections, of a series of fingers mounted on rocking shafts and perforated on a line with the spaces between the upright projections, and provisions for rocking the shafts, substantially as set forth.

2. In a shaking-grate, a supporting-frame having a series of upright projections, rocking shafts carrying a series of interleaved fingers perforated on a line with the spaces between the upright projections, connections with alternate shafts, separate connections with the intermediate shafts, and provisions for operating said connections so as to oppositely rock the two series of shafts all substantially as herein specified.

3. In ashaking-grate, the combination with a supporting-frame having a series of separated upright projections, of a series of interleaved fingers mounted on low-centered shafts and perforated contiguous to the same and on a line with the spaces between the upright projections, a horizontal link connected with arms extending down from alternate shafts another horizontal link connected with the arms of the intermediate shafts, a lever adapted to be rocked by the attendant, and connections from said links one above and one below the center of motion of such lever and thereby oppositely rocking the two series of shafts, all substantially as herein specified.

4. In a shaking-grate, the combination with a supporting-frame having a series of separated upright projections, of a series of interleaved fingers mounted on low-centered shafts and perforated contiguous to the same and on a line with the spaces between the upright projections, a horizontal link connected with arms extending down from alternate shafts, another horizontal link connected with the arms of the intermediate shafts, a lever adapted to be rocked by the attendant, rigid arms D', E', depending from the links, rods I, J, having threaded inner ends adjustably connected by nuts K K', with said depending arms, and at their outer ends one above and one below the center of motion of the operating-lever, whereby the rocking of the latter will oppositely rock the two series of shafts, all substantially as herein specified.

5. In a shaking-grate, the combination With the frame having a series of upright projections and the lower side bearings and engaging means at its corners, and the shafts resting in said bearings and having fingers perforated on a line with the spaces between the stationary upright projections of the frame, of a central longitudinal brace-bar detachably resting in pockets therefor in the end of the frame, removable grate-sections retained by the corner-ridges and central brace-bar, and provisions for rocking the shafts in their bearings, substantially as herein specified.

6. A fire-grate characterized by a side bar of the supporting-frame of which bar the upper edge is composed of separated upright projections in the forni of inverted triangles atcached at their apexes and placed parallel with the body of said bar, in combination with grate-bars having a series of fingers horizontally perforated, the perforations being on a line with the spaces between the upright projections of the side bar substantially as described.

7. A fire-grate characterized by a removable middle bar A2 having its upper edge composed of upright inverted triangular projections formed integral and fixed side bars A having similar projections coinciding therewith, and having rocking grate-sections occupying the main area of the grate between such bars, said rocking sections having apertures b which when the grate is in use are in line with the spaces between said triangular inverted projections all adapted to serve substantially as herein specified.

In testimony that I claim the invention above set forth I affix my signature in presence of two witnesses.

CHARLES YINGLING.

Witnesses:

J. B. CLANTICE, M. F. BoYLE.

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